You really can't go wrong with Clarion. I have installed some in the past and have nothing but good things to say. Check out Crutchfield, they offer free wire harness and adapter, most times. Seems like a decent price that you have found, though I haven't looked anywhere else.

I have clarion in my Boat with AMp and 6 speakers, and it Jam's! For those little co-Axial's 6" it sounds like i have subs. It is very clear and plays Clear when the volume is way up. Hardly any distortion.

I am jut starting to do research on HU's and hope to have Seperate component's and multi amp system installed...